1. Find the mean, mode, median, and midrange value for the following data set.
12, 15, 18, 18, 15, 22, 15, 30, 12
2. Find the weighted mean for three exams if the first one was worth 75 points and the student received a score of 70%, the second was worth 50 points and the student received a score of 80% and the third was worth 30 points and the student received a score of 95%?
3. Given the following data set, find the value that corresponds to the 75th percentile.
10, 44, 15, 23, 14, 18, 72, 56
4. The range of the set of numbers {4, 13, 3, 10, 5} is
5. If a student scored 74 points on a test where the mean score was 81 and the standard deviation was 5. Then what was the student's z-score?
6. What is the maximum of the set of numbers {9, 15, -5, 11, 5}?
7. What is the median of the following numbers?
4, 6, 9, 11, 15a
8. If the mean of a set of data is 20.00, and 14.00 has a z-score of –1.00, then what is the standard deviation?
9. Which of the following is the mode for the given data?
5, 4, 3, 4, 5, 6, 5, 5, 3, 4
10. Find the mode for the number of police officers in selected city districts.
24, 26, 24, 30, 23, 28, 19, 31, 24, 26, 19